Designing quieter, more
efficient aerospace systems will require coupled, high-fidelity analysis and
optimization in the areas of aerodynamics and aeroacoustics. This paper presents
a design methodology for addressing these two disciplines within a single
framework.

After detailing the
governing flow and time-accurate continuous adjoint equations for unsteady
aerodynamics, a continuous adjoint formulation for the control of noise is developed.
In order to obtain the required remote sensitivity information for an off-body observer of
noise, the adjoint formulations for aerodynamics and aeroacoustics are related through
a coupling boundary condition. The result is an efficient, adjoint-based
methodology for design problems involving both aerodynamic performance and
noise control. Furthermore, the coupled-adjoint method could be applied to
other multiphysics problems where adjoint sensitivities are desired.